IBM x3655 Service Guide - Page 153

Power, problems

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Power problems v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See Chapter 4, "Parts listing, System x3655, Type 7985," on page 97 to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU). v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a trained service technician. Symptom Action The power-control button does 1. Make sure that: not work, and the reset button does work (the server does not start). v The power cords are correctly connected to the server and to a working electrical outlet. Note: The power-control button v The correct type of memory is installed. will not function until 20 v The LEDs on the power supply do not indicate a problem (see seconds after the server has "Power-supply LEDs" on page 142). been connected to ac power. v The microprocessors are installed in the correct sequence. 2. Make sure that the power-control button and the reset button are working correctly: a. Disconnect the server power cords. b. Reconnect the power cords. c. Reseat the operator information panel cable. d. Press the power-control button to restart the server. If the button does not work, replace the operator information panel assembly. e. Press the reset button to restart the server. If the button does not work, replace the operator information panel assembly. 3. If you just installed an optional device, remove it and restart the server. If the server now turns on, you might have installed more devices than the power supply supports. 4. Reseat the power backplane and restart the server. 5. Replace the power backplane and restart the server. 6. Replace the following components one at a time, in the order shown, restarting the server each time: a. Hot-swap power supplies b. (Trained service technician 0nly) System board 7. See "Solving power problems" on page 175 8. See "Solving undetermined problems" on page 177. The server does not turn off. 1. Determine whether you are using an Advanced Configuration and Power Management (ACPI) or a non-ACPI operating system. If you are using a non-ACPI operating system, complete the following steps: a. Press Ctrl+Alt+Delete. b. Turn off the server by pressing the power-control button for 5 seconds. c. Restart the server. d. If the server fails POST and the power-control button does not work, disconnect the ac power cord for 20 seconds; then, reconnect the ac power cord and restart the server. 2. If the problem remains or if you are using an ACPI-aware operating system, suspect the system board. The server unexpectedly shuts down, and the LEDs on the operator information panel are not lit. See "Solving undetermined problems" on page 177. Chapter 5. Diagnostics 135

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Power
problems
v
Follow
the
suggested
actions
in
the
order
in
which
they
are
listed
in
the
Action
column
until
the
problem
is
solved.
v
See
Chapter
4,
“Parts
listing,
System
x3655,
Type
7985,”
on
page
97
to
determine
which
components
are
customer
replaceable
units
(CRU)
and
which
components
are
field
replaceable
units
(FRU).
v
If
an
action
step
is
preceded
by
“(Trained
service
technician
only),”
that
step
must
be
performed
only
by
a
trained
service
technician.
Symptom
Action
The
power-control
button
does
not
work,
and
the
reset
button
does
work
(the
server
does
not
start).
Note:
The
power-control
button
will
not
function
until
20
seconds
after
the
server
has
been
connected
to
ac
power.
1.
Make
sure
that:
v
The
power
cords
are
correctly
connected
to
the
server
and
to
a
working
electrical
outlet.
v
The
correct
type
of
memory
is
installed.
v
The
LEDs
on
the
power
supply
do
not
indicate
a
problem
(see
“Power-supply
LEDs”
on
page
142).
v
The
microprocessors
are
installed
in
the
correct
sequence.
2.
Make
sure
that
the
power-control
button
and
the
reset
button
are
working
correctly:
a.
Disconnect
the
server
power
cords.
b.
Reconnect
the
power
cords.
c.
Reseat
the
operator
information
panel
cable.
d.
Press
the
power-control
button
to
restart
the
server.
If
the
button
does
not
work,
replace
the
operator
information
panel
assembly.
e.
Press
the
reset
button
to
restart
the
server.
If
the
button
does
not
work,
replace
the
operator
information
panel
assembly.
3.
If
you
just
installed
an
optional
device,
remove
it
and
restart
the
server.
If
the
server
now
turns
on,
you
might
have
installed
more
devices
than
the
power
supply
supports.
4.
Reseat
the
power
backplane
and
restart
the
server.
5.
Replace
the
power
backplane
and
restart
the
server.
6.
Replace
the
following
components
one
at
a
time,
in
the
order
shown,
restarting
the
server
each
time:
a.
Hot-swap
power
supplies
b.
(Trained
service
technician
0nly)
System
board
7.
See
“Solving
power
problems”
on
page
175
8.
See
“Solving
undetermined
problems”
on
page
177.
The
server
does
not
turn
off.
1.
Determine
whether
you
are
using
an
Advanced
Configuration
and
Power
Management
(ACPI)
or
a
non-ACPI
operating
system.
If
you
are
using
a
non-ACPI
operating
system,
complete
the
following
steps:
a.
Press
Ctrl+Alt+Delete.
b.
Turn
off
the
server
by
pressing
the
power-control
button
for
5
seconds.
c.
Restart
the
server.
d.
If
the
server
fails
POST
and
the
power-control
button
does
not
work,
disconnect
the
ac
power
cord
for
20
seconds;
then,
reconnect
the
ac
power
cord
and
restart
the
server.
2.
If
the
problem
remains
or
if
you
are
using
an
ACPI-aware
operating
system,
suspect
the
system
board.
The
server
unexpectedly
shuts
down,
and
the
LEDs
on
the
operator
information
panel
are
not
lit.
See
“Solving
undetermined
problems”
on
page
177.
Chapter
5.
Diagnostics
135